{"id":"CVE-2021-27363","details":"An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.","modified":"2026-03-15T22:39:56.442897Z","published":"2021-03-07T04:15:13.330Z","related":["ALSA-2021:1093","MGASA-2021-0151","MGASA-2021-0152","SUSE-SU-2021:1046-1","SUSE-SU-2021:1074-1","SUSE-SU-2021:1075-1","SUSE-SU-2021:1145-1","SUSE-SU-2021:1148-1","SUSE-SU-2021:1175-1","SUSE-SU-2021:1176-1","SUSE-SU-2021:1177-1","SUSE-SU-2021:1210-1","SUSE-SU-2021:1211-1","SUSE-SU-2021:1238-1","SUSE-SU-2021:14724-1","SUSE-SU-2021:1573-1","SUSE-SU-2021:1596-1","SUSE-SU-2021:1617-1","SUSE-SU-2021:1623-1","SUSE-SU-2021:1624-1","SUSE-SU-2021:1625-1","SUSE-SU-2021:1975-1","SUSE-SU-2021:1977-1","SUSE-SU-2021:2577-1","openSUSE-SU-2021:0532-1","openSUSE-SU-2021:0758-1","openSUSE-SU-2021:1975-1","openSUSE-SU-2021:1977-1"],"references":[{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210409-0001/"},{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html"},{"type":"REPORT","url":"https://bugzilla.suse.com/show_bug.cgi?id=1182716"},{"type":"FIX","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aa"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2021/03/06/1"},{"type":"EVIDENCE","url":"https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27363.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"5.11.3"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L"}]}